Abstract: This paper assesses the Everettian approach to the measurement problem, especially the version of that approach advocated by Simon Saunders and David Wallace. I emphasise conceptual, indeed metaphysical, aspects rather than technical ones; but I include an introductory exposition of decoherence. In particular, I discuss whether---as these authors maintain---it is acceptable to have no precise definition of 'branch' (in the Everettian kind of sense). (A version of this paper will appear in a CTNS/Vatican Observatory volume on Quantum (...) Theory and Divine Action, ed. Robert Russell et al.). (shrink)

Properly understood, the instrumental rule says to take means that actually suffice for my end, not, as is nearly universally assumed, to intend means that I believe are necessary for my end. This alternative explains everything the standard interpretation can—and more, including grounding certain correctness conditions for exercises of our will unexplained by the standard interpretation.

Is the exemplar of modern ethical theory estranged from their intimates because the motive of duty dominates their motivational psychology? While this challenge against modern ethical theory is familiar, I argue that with respect to a certain strand of Kantian ethical theory, it does not so much as make sense. I explain the content and functional role of the motive of duty in the psychology of the moral exemplar, stressing in particular how that motive shapes and informs the content of (...) others, including those characteristic of intimacy. I argue that to the extent that a subject does not integrate their motive of duty with their other motives, their moral and intimate relationships are compromised, and on the same grounds, because intimate relationships are interpersonal relationships and the motive of duty just is the motive to respect another person as a separate person. (shrink)

Some things, but only some things, are by nature subject to standards. Why? I explain and develop what I call nature-first constitutivism, which says that what something is determines what it should be. Nature is the basis of normativity. I explain this view in terms of a unique type of property which particulars of a genus can lack even though those properties partially determines the nature of the genus. Such properties partially describe the nature of a genus and are thereby (...) normative for the particulars of that genus. Particulars of genera with such essential properties are by nature subject to standards with respect to those properties. Particulars of genera without such properties are not by nature subject to standards. (shrink)

Intellectualism is the widespread view that practical reason is a species of theoretical reason, distinguished from others by its objects: reasons to act. I argue that if practical reason is a species of theoretical reason, practical judgments by nature have nothing to do with action. If they have nothing to do with action, I cannot act from my representation of reasons for me to act. If I cannot act from those representations, those reasons cannot exist. If they cannot exist, neither (...) can a species of theoretical reason about them. Intellectualism is thus self-undermining. (shrink)

The possibility of error conditions the possibility of normative principles. I argue that extant interpretations of this condition undermine the possibility of normative principles for our action because they implicitly treat error as a perfection of an action. I then explain how a constitutivist metaphysics of capacities explains why error is an imperfection of an action. Finally, I describe and defend the interpretation of the error condition which follows.

What explains why we are subjects for whom objects can have value, and what explains which objects have value for us? Axiologicians say that the value of humanity is the answer. I argue that our value, no matter what it is like, cannot perform this task. We are animals among others. An explanation of the value of objects for us must fit into an explanation of the value of objects for animals generally. Different objects have value for different animals. Those (...) differences depend on differences in animal natures and, in particular, on the diverse characteristic capacities of different animals. Once we invoke animal natures, there is nothing for the value of animality, including the value of humanity, to explain. (shrink)

Properly understood, the instrumental rule says to take means that actually suffice for my end, not, as is nearly universally assumed, to intend means that I believe are necessary for my end. This alternative explains everything the standard interpretation can—and more, including grounding certain correctness conditions for exercises of our will unexplained by the standard interpretation.

Practical cognitivism is the view that practical reason is our will, not an intellectual capacity whose exercises can influence those of our will. If practical reason is our will, thoughts about how I am to act have an essential tie to action. They are intentions. Thoughts about how others are to act, though, lack such a tie to action. They are beliefs, not intentions. How, then, can these thoughts form a unified class? I reject two answers which deny the differences (...) between such thoughts about myself and those about others, one of which says that all such thoughts are intentions, the other that all are beliefs. I then reject a shared assumption which says that a class of thoughts is unified only if all its elements are all of one type of thought. I instead argue that this class is unified even though some elements are intentions, others beliefs, because such beliefs depend on those intentions in various ways. (shrink)

Practical cognitivism is the view that practical reason is the self-conscious will and that practical cognition is self-conscious volition. This essay addresses two puzzles for practical cognitivism. In akratic action, I act as I understand is illegitimate and not as I understand is legitimate. In permissible action, I act as I understand is legitimate and also do not act as I understand is legitimate. In both types of action, practical cognition seems to come apart from volition. How, then, can practical (...) reason be our will and practical cognition be volition? Practical cognitivists can solve these puzzles because the claims that practical reason is our will and that practical cognition is volition are about the nature of a capacity, and the nature of a capacity establishes standards of correctness for its exercises. Akratic action is a type of erroneous exercise of practical reason as tripping is an erroneous exercise our capacity to walk. Permissible action is a successful exercise of practical reason as stepping first with my right foot rather than my left is a successful exercise of my capacity to walk. The puzzles of akratic and permissible action do not refute practical cognitivism. (shrink)

What is the function of morality—what is it all about? What is the basis of morality—what explains our moral agency and patiency? This essay defends a unique Kantian answer to these questions. Morality is about securing our independence from each other by giving each other equal discretion over whether and how we interact. The basis of our moral agency and patiency is practical reason. The first half addresses objections that this account cannot explain the moral patiency of beings who are (...) not also moral agents such as infantile, elderly, and infirm human beings and the other animals who are not moral agents. The second half argues that this account is preferable, on grounds of consistency with the basic Kantian account of the function and content of morality, to the familiar account of our moral patiency, popular especially though not exclusively with contemporary Kantians, in terms of the value of humanity. (shrink)

Explores how the emotional experience of gratitude has been enlisted in neoliberal governance through the language of debt. In The Art of Gratitude, Jeremy David Engels sketches a genealogy of gratitude from the ancient Greeks to the contemporary self-help movement. One of the most striking things about gratitude, Engels finds, is how consistently it is described using the language of indebtedness. A chief purpose of this, he contends, is to make us more comfortable living lives in debt, with (...) the nefarious effect of pacifying the citizenry so we are less likely to speak out about social and economic injustice. To counteract this, he proposes an alternative art of gratitude-as-thanksgiving that is inspired by Indian philosophy, particularly the yoga philosophy of the Bhagavad Gita and Patanjali’s Yoga-Sutras. He argues that this art of gratitude can challenge neoliberalism by reorienting our politics away from resentment, anger, and guilt and toward a democratic ethic of thanksgiving and the common good. Jeremy David Engels is the Sherwin Early Career Professor in the Rock Ethics Institute and Associate Professor of Communication Arts and Sciences at Penn State University. He is the author of The Politics of Resentment: A Genealogy and Enemyship: Democracy and Counter-Revolution in the Early Republic. (shrink)

This article is constructed through a series of linked aphorisms that articulate the relations between autonomy, sense, the world, different people’s worlds, disagreement, and wonder. It advances anthroponomy—the organization of humankind to support autonomous life. In the context of the planetary, sociallycaused environmental changes of today such as global warming or the risk of a mass extinction cascade, a part of autonomous engagement with our planetary situation is developing an autonomous conception of it—a conception of our situation that makes sense (...) to us. This pluralistic idea has consequences for environmentalism, notably around coloniality, and the reduction of different autonomous worlds to a dominant world, which is currently part of the discourse of the Anthropocene. The aphorisms in this article develop a reflective path toward autonomous conceptions of our planetary situation given the reality of coloniality in how that situation is understood. One result of this path is to open up a way for people to become more autonomously engaged with our environmental situation, an engagement grounded in wonder and critical of the discourse of the “Anthropocene”. (shrink)

There's a moment about halfway through Avatar where Jake Sully wakes up disoriented from the link to his avatar. “Everything is backwards now,” he says, “like out there is the true world and in here is the dream.” Jake's life in the Resources Development Administration (RDA) mining colony seems unreal, while his avatar life seems real. There are shortsighted and enlightened versions of anthropocentrism. In Avatar, the RDA corporation offers an example of anthropocentric thinking. Rather than frame the issue in (...) terms of shortsighted versus enlightened anthropocentricism, however, it is more helpful to think about superficial versus deep humanity. Avatar suggests that a superficial sense of our humanity involves shortsighted anthropocentrism. Not only does the movie work with the novel category of deep humanity, but it also depicts “relational reason”, the logic that deepens our humanity. (shrink)

© 2017. The American Astronomical Society. All rights reserved.We present new observations of the low-mass companion to HD 984 taken with the Gemini Planet Imager as a part of the GPI Exoplanet Survey campaign. Images of HD 984 B were obtained in the J and H bands. Combined with archival epochs from 2012 and 2014, we fit the first orbit to the companion to find an 18 au orbit with a 68% confidence interval between 14 and 28 au, an eccentricity (...) of 0.18 with a 68% confidence interval between 0.05 and 0.47, and an inclination of 119°with a 68% confidence interval between 114°and 125°. To address the considerable spectral covariance in both spectra, we present a method of splitting the spectra into low and high frequencies to analyze the spectral structure at different spatial frequencies with the proper spectral noise correlation. Using the split spectra, we compare them to known spectral types using field brown dwarf and low-mass star spectra and find a best-fit match of a field gravity M6.5 ±1.5 spectral type with a corresponding temperature of K. Photometry of the companion yields a luminosity of log=2.88 ± 0.07 dex with DUSTY models. Mass estimates, again from DUSTY models, find an age-dependent mass of 34 ±1 to 95 ±4 M Jup. These results are consistent with previous measurements of the object. (shrink)

David Wallace argues that we should take quantum theory seriously as an account of what the world is like--which means accepting the idea that the universe is constantly branching into new universes. He presents an accessible but rigorous account of the 'Everett interpretation', the best way to make coherent sense of quantum physics.

I give a fairly systematic and thorough presentation of the case for regarding black holes as thermodynamic systems in the fullest sense, aimed at students and non-specialists and not presuming advanced knowledge of quantum gravity. I pay particular attention to the availability in classical black hole thermodynamics of a well-defined notion of adiabatic intervention; the power of the membrane paradigm to make black hole thermodynamics precise and to extend it to local-equilibrium contexts; the central role of Hawking radiation in permitting (...) black holes to be in thermal contact with one another; the wide range of routes by which Hawking radiation can be derived and its back-reaction on the black hole calculated; the interpretation of Hawking radiation close to the black hole as a gravitationally bound thermal atmosphere. In an appendix I discuss recent criticisms of black hole thermodynamics by Dougherty and Callender. This paper confines its attention to the thermodynamics of black holes; a sequel will consider their statistical mechanics. (shrink)

I make the case that the Universe according to unitary quantum theory has a branching structure, and so can literally be regarded as a "many-worlds" theory. These worlds are not part of the _fundamental_ ontology of quantum theory - instead, they are to be understood as structures, or patterns, emergent from the underlying theory, through the dynamical process of decoherence. That they are structures in this sense does not mean that they are in any way unreal: indeed, pretty much all (...) higher-level ontology in science, from tables to phonons to tigers, is likewise emergent. Unitary quantum theory is therefore a "many-worlds" theory without any modification of the mathematical structure of the theory: the Everett interpretation does not consist in adding worlds to the formalism, but in realising that they are there already. Our grounds for accepting the reality of those worlds is no more, but no less, than our grounds for accepting any other not-directly observable consequence of an empirically very successful theory. (shrink)

I investigate the consequences for semantics, and in particular for the semantics of tense, if time is assumed to have a branching structure not out of metaphysical necessity (to solve some philosophical problem) but just as a contingent physical fact, as is suggested by a currently-popular approach to the interpretation of quantum mechanics.

A reply to a comment by Paul Tappenden (BJPS 59 (2008) pp. 307-314) on S. Saunders and D. Wallace, "Branching and Uncertainty" (BJPS 59 (2008) pp. 298-306).

The biopsychosocial model of challenge and threat posits that resource and demand appraisals interact in situations of acute stress to determine affective responses, and concomitant physiological responses, motivation, and decisions/behaviors. Regulatory approaches that alter appraisals to regulate challenge and threat affective states have the potential to facilitate coping. This reply clarifies the conceptualization of one such regulatory approach, arousal reappraisal, and suggests avenues for future research. However, it is important to note that arousal reappraisal is not a “silver bullet” for (...) improving stress outcomes, nor should this strategy be expected to positively impact all individuals. More work is needed to better elucidate how psychological and biological stress processes interact to shape health. (shrink)

This article provides current Schwartz Values Survey (SVS) data from samples of business managers and professionals across 50 societies that are culturally and socioeconomically diverse. We report the society scores for SVS values dimensions for both individual- and societal-level analyses. At the individual-level, we report on the ten circumplex values sub-dimensions and two sets of values dimensions (collectivism and individualism; openness to change, conservation, self-enhancement, and self-transcendence). At the societal-level, we report on the values dimensions of embeddedness, hierarchy, mastery, affective (...) autonomy, intellectual autonomy, egalitarianism, and harmony. For each society, we report the Cronbach’s α statistics for each values dimension scale to assess their internal consistency (reliability) as well as report interrater agreement (IRA) analyses to assess the acceptability of using aggregated individual level values scores to represent country values. We also examined whether societal development level is related to systematic variation in the measurement and importance of values. Thus, the contributions of our evaluation of the SVS values dimensions are two-fold. First, we identify the SVS dimensions that have cross-culturally internally reliable structures and within-society agreement for business professionals. Second, we report the society cultural values scores developed from the twenty-first century data that can be used as macro-level predictors in multilevel and single-level international business research. (shrink)

I criticize the widely-defended view that the quantum measurement problem is an example of underdetermination of theory by evidence: more specifically, the view that the unmodified, unitary quantum formalism (interpreted following Everett) is empirically indistinguishable from Bohmian Mechanics and from dynamical-collapse theories like the GRW or CSL theories. I argue that there as yet no empirically successful generalization of either theory to interacting quantum field theory and so the apparent underdetermination is broken by a very large class of quantum experiments (...) that require field theory somewhere in their description. The class of quantum experiments reproducible by either is much smaller than is commonly recognized and excludes many of the most iconic successes of quantum mechanics, including the quantitative account of Rayleigh scattering that explains the color of the sky. I respond to various arguments to the contrary in the recent literature. (shrink)

I argue against the currently prevalent view that algebraic quantum field theory (AQFT) is the correct framework for philosophy of quantum field theory and that “conventional” quantum field theory (CQFT), of the sort used in mainstream particle physics, is not suitable for foundational study. In doing so, I defend that position that AQFT and CQFT should be understood as rival programs to resolve the mathematical and physical pathologies of renormalization theory, and that CQFT has succeeded in this task and AQFT (...) has failed. I also defend CQFT from recent criticisms made by Doreen Fraser. (shrink)

I provide a fairly systematic analysis of when quantities that are variant under a dynamical symmetry transformation should be regarded as unobservable, or redundant, or unreal; of when models related by a dynamical symmetry transformation represent the same state of affairs; and of when mathematical structure that is variant under a dynamical symmetry transformation should be regarded as surplus. In most of these cases the answer is `it depends': depends, that is, on the details of the symmetry in question. A (...) central feature of the analysis is that in order to draw any of these conclusions for a dynamical symmetry it needs to be understood in terms of its possible extensions to other physical systems, in particular to measurement devices. (shrink)

I develop an account of how mathematized theories in physics represent physical systems, in response to the frequent claim that any such account must presuppose a non-mathematized, and usually linguistic, description of the system represented. The account I develop contains a circularity, in that representation is a mathematical relation between the models of a theory and the system as represented by some other model --- but I argue that this circularity is not vicious, in any case refers in linguistic accounts (...) of meaning and representation, and is simply a consequence of the fact that we have no unmediated, representation-independent access to the world. (shrink)

A systematic analysis is made of the relations between the symmetries of a classical field and the symmetries of the one-particle quantum system that results from quantizing that field in regimes where interactions are weak. The results are applied to gain a greater insight into the phenomenon of antimatter.

Regulating affective responses to acute stress has the potential to improve health, performance, and well-being outcomes. Using the biopsychosocial model of challenge and threat as an organizing framework, we review how appraisals inform affective responses and highlight research that demonstrates how appraisals can be used as regulatory tools. Arousal reappraisal, specifically, instructs individuals on the adaptive benefits of stress arousal so that arousal is conceptualized as a coping resource. By reframing the meaning of signs of arousal that accompany stress, it (...) is possible to break the link between stressful situations, and malignant physiological responses and experiences of negative affect. Applications of arousal reappraisal for academic contexts and clinical science, and directions for future research are discussed. (shrink)

Decoherence is widely felt to have something to do with the quantum measurement problem, but getting clear on just what is made diffcult by the fact that the "measurement problem", as traditionally presented in foundational and philosophical discussions, has become somewhat disconnected from the conceptual problems posed by real physics. This, in turn, is because quantum mechanics as discussed in textbooks and in foundational discussions has become somewhat removed from scientific practice, especially where the analysis of measurement is concerned. This (...) paper has two goals: firstly, to present an account of how quantum measurements are actually dealt with in modern physics and to state the measurement problem from the perspective of that account; and secondly, to clarify what role decoherence plays in modern measurement theory and what effect it has on the various strategies that have been proposed to solve the measurement problem. (shrink)

I attempt to get as clear as possible on the chain of reasoning by which irreversible macrodynamics is derivable from time-reversible microphysics, and in particular to clarify just what kinds of assumptions about the initial state of the universe, and about the nature of the microdynamics, are needed in these derivations. I conclude that while a “Past Hypothesis” about the early Universe does seem necessary to carry out such derivations, that Hypothesis is not correctly understood as a constraint on the (...) early Universe’s entropy. (shrink)

In this collection of scenarios and episodes, many of which were experienced by the authors in their years as school administrators, you will find an array of provocative examples of social injustice in the classroom, and what you can do to prevent it in your own school community.

Using as a starting point recent and apparently incompatible conclusions by Saunders and Knox, I revisit the question of the correct spacetime setting for Newtonian physics. I argue that understood correctly, these two versions of Newtonian physics make the same claims both about the background geometry required to define the theory, and about the inertial structure of the theory. In doing so I illustrate and explore in detail the view—espoused by Knox, and also by Brown —that inertial structure is defined (...) by the dynamics governing subsystems of a larger system. This clarifies some interesting features of Newtonian physics, notably the distinction between using the theory to model subsystems of a larger whole and using it to model complete universes, and the scale-relativity of spacetime structure. _1_ Introduction _2_ Newtonian Mechanics and Galilean Spacetime _3_ Vector Relationism and Maxwellian Spacetime _4_ Recovering the Galilei Group: Dynamics of Subsystems _5_ Knox on Inertial Structure _6_ Connections on Maxwellian Spacetime _7_ Knox on Newtonian Gravity _8_ Vector Relationism and Newton–Cartan Theory _9_ Inertial Structure in Newton–Cartan Gravity _10_ Reconciling Knox and Saunders _11_ Conclusions. (shrink)

I point out a radical indeterminism in potential-based formulations of Newtonian gravity once we drop the condition that the potential vanishes at infinity. This indeterminism, which is well known in theoretical cosmology but has received little attention in foundational discussions, can be removed only by specifying boundary conditions at all instants of time, which undermines the theory's claim to be fully cosmological, i.e., to apply to the Universe as a whole. A recent alternative formulation of Newtonian gravity due to Saunders (...) pp.22-48) provides a conceptually satisfactory cosmology but fails to reproduce the Newtonian limit of general relativity in homogenous but anisotropic universes. I conclude that Newtonian gravity lacks a fully satisfactory cosmological formulation. (shrink)

An investigation is made into how the foundations of statistical mechanics are affected once we treat classical mechanics as an approximation to quantum mechanics in certain domains rather than as a theory in its own right; this is necessary if we are to understand statistical-mechanical systems in our own world. Relevant structural and dynamical differences are identified between classical and quantum mechanics (partly through analysis of technical work on quantum chaos by other authors). These imply that quantum mechanics significantly affects (...) a number of foundational questions, including the nature of statistical probability and the direction of time. (shrink)

An extended analysis is given of the program, originally suggested by Deutsch, of solving the probability problem in the Everett interpretation by means of decision theory. Deutsch's own proof is discussed, and alternatives are presented which are based upon different decision theories and upon Gleason's Theorem. It is argued that decision theory gives Everettians most or all of what they need from `probability'. Contact is made with Lewis's Principal Principle linking subjective credence with objective chance: an Everettian Principal Principle is (...) formulated, and shown to be at least as defensible as the usual Principle. Some consequences of (Everettian) quantum mechanics for decision theory itself are also discussed. -/- [NB: this this long (70 pages) and occasionally rambling online-only paper has been almost entirely superseded by material in subsequent; if something is not included in them it usually means that I have had second thoughts. I include it for completeness only. (shrink)

I address the problem of indefiniteness in quantum mechanics: the problem that the theory, without changes to its formalism, seems to predict that macroscopic quantities have no definite values. The Everett interpretation is often criticised along these lines, and I shall argue that much of this criticism rests on a false dichotomy: that the macroworld must either be written directly into the formalism or be regarded as somehow illusory. By means of analogy with other areas of physics, I develop the (...) view that the macroworld is instead to be understood in terms of certain structures and patterns which emerge from quantum theory (given appropriate dynamics, in particular decoherence). I extend this view to the observer, and in doing so make contact with functionalist theories of mind. (shrink)